import numpy as np

B = [0.16, 0.14, 0.15]
R = [76, 76, 90]
F1 = []
for b, r in zip(B, R):
    p = 1 / (1 + b) * 100
    F1.append(2 * r * p / (r + p))
F1 = np.array(F1)
print(np.mean(F1))
